Matter+Labs

Expansion and Contraction Lab
 **Problem: Will a balloon expand and contract at different temeratures**  **Research:** warm or hot molecules spread apart and colder molecules stay tighter.  **Hypothesis:If I place a deflated balloon over a water bottle in warm water, then**  it will inflate. And if I put the ballon with the water bottle in the cold water, then it will deflate. **Materials: Safety goggles, Balloon,** **Plastic bottle, Warm water,** **Cold water**  **Procedure:** Place a deflated balloon over an empty water bottle and then put the bottle in warm water for about thirty seconds then do the same but in the cold water.  1.) Stretch the opening of the balloon over the neck of the bottle. 2.)  Observe the balloon at room temperature. Record observations. 3.) Place the bottle with the ballon in the warm water for about 30 seconds. 4.) Observe the ballon again and record any changes you see in the balloon. <span style="font-family: Tahoma; font-size: 14pt; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: Tahoma; msobidifontsize: 12.0pt; msofareastfontfamily: Tahoma; msolist: Ignore;">5.) Remove the bottle and ballon from the warm water and quickly place it in the cold water for about 30 seconds (or until it cools). 6.) Observe the ballon and record any changes you see in the ballon. <span style="font-family: Tahoma,Geneva,sans-serif; font-size: 12pt; mso-bidi-font-size: 12.0pt; msobidifontsize: 12.0ptmsoBidiFontSize;"> <span style="font-family: Tahoma,Geneva,sans-serif; font-size: 12pt; msobidifontsize: 12.0ptmsoBidiFontSize;">**Results:** The balloon in fact, did expand in the warm water and contract in the cooler water. <span style="font-family: Tahoma,Geneva,sans-serif; font-size: 12pt; mso-bidi-font-size: 12.0pt; msobidifontsize: 12.0ptmsoBidiFontSize;"> Use the physical characteristics to describe the balloon. loose air || balloon contracted || <span style="font-family: Tahoma,Geneva,sans-serif; font-size: 12pt; mso-bidi-font-size: 12.0pt; msobidifontsize: 12.0ptmsoBidiFontSize;"> <span style="font-family: Tahoma,Geneva,sans-serif; font-size: 12pt; msobidifontsize: 12.0ptmsoBidiFontSize;">**Conclusion: My hypothosis was correct in the expand and contraction lab. The ballon did expand in the warm water and contract in the cooler water. This is because warm gas molecules are more spread out then cooler molecules. Therefore, the balloon expanded as such and since cold molecules are less spread out than warmer ones the balloon contracted and didn't expand. As you can see, my hypothosis was accurate.**
 * Water Temperature || Prediction || Description of the Balloon ||
 * Room Temperature || ballon would deflate || Baloon stayed the same ||
 * Warm || ballon would inflate || balloon expanded ||
 * Cold || balloon would also deflate or

85% ||
 * I can state a hypothesis related to the problem and procedure. || I can conduct research about concepts that are related to the topic I am investigating. || I can collect quantitative/qualitative data while conducting an experiment. || I can use the data in my results to draw a conclusion about what happened and why. || Overall, I can apply the scienctific method to solve a problem. || Total ||
 * 1 2 3 **4** || 1 2 3 **4** || 1 2 **3** 4 || 1 2 **3** 4 || 1 2 **3** 4 || 17/20